Apparatus for false twisting yarn

ABSTRACT

A false twisting head having a rotatable drive shaft detachably secured to a support. The head is located at the required position on the support by engagement of a shoulder on the head with a step on the support.

United States Patent Mattingly 1 Apr.25,W72

[54] APPARATUS FOR FALSE TWISTING YARN [72] Inventor: Denis Albert Edward Mattingly, Enfield,

England Ernest Scragg & Sons Limited, Macclesfield, Cheshire, England [73] Assignee:

[22] Filed: Apr. 3, 1970 [21] Appl. No; 25,534

[52] U.S. Cl ..57/77.45

[5i] lnt.Cl ..D01l17/92,D01h7/46 [58] Field of Search ..57/77.3-77.45, 57/89, 92, 103,104

[56] References Cited UNITED STATES PATENTS Raschle ..57/77.45 X

2,837,889 6/1958 Comer ..57/77.45 x 2,855,750 10/1958 Schrenk et al. ..57/77.45 x 3,074,225 1/1963 Scragg ..57/77.4s 3,074,226 l/l963 Hilbert... 57/7745 3,115,743 12/1963 Brodtmann... .57/7745 3,233,398 2/1966 GllChllSI 57/7745 24 3,304,706 2/1967 Mattingly ..57/77.45 3,385,047 5/1968 Schwabe... ..57/77.45 3,488,678 1/1970 Bieniok .57/77 45 Primary Examinew-Donald E, Watkins Attorney-N0lte and Nolte [57] ABSTRACT A false twisting head having a rotatable drive shaft detachably secured to a support. The head is located at the required position on the support by engagement of a shoulder on the head with a step on the support.

6 Claims, 3 Drawing Figures APPARATUS FOR FALSE TWISTING YARN The present invention relates to apparatus for false twisting yarn in which a plurality of false twist heads are secured to a supporting member of a false twist machine. Each false twist head comprises a frame, a drive shaft rotatably mounted in bearings on the frame, a driving wheel secured to the drive shaft, and means mounted on the frame for holding a false twist spindle in engagement with the driving wheel.

The invention provides an apparatus for false twisting yarn comprising a false twisting head which head is detachably secured to a support and there are interengaging means on the head and support for defining the location of the head with respect to the support.

Said interengaging means may define the location of the head on the support in a direction extending transversely to the direction of the path of travel of yarn through the false twisting head.

In the case where the false twisting head has a rotatable drive shaft for driving a yarn twisting device, the interengaging means on the head and support may define the location of the head with respect to the support in a direction extending transversely to the axis of rotation of the shaft.

In the case where the shaft is driven by a flight of an endless belt the interengaging means may define the location of the head with respect to the support in a direction extending transversely to the path of travel of said flight.

The interengaging means on the head and support may comprise abutment faces.

The support may have a surface for receiving the head havin g a step which provides one of said engaging abutment faces and the head may have a surface for engaging the surface on the support, the surface on the head having a shoulder providing the other of said engaging abutment faces.

The head may be detachably secured to the support by clamping means.

The clamping means may comprise a bolt securing the head and support together.

The support may be movably mounted.

The following is a description of some embodiments of the invention reference being made to the accompanying drawings in which:

FIG. 1 is a partly sectioned side elevation of a false twist head,

FIG. 2 is a plan view of the false twist head shown in FIG. 1, and

FIG. 3 is a side elevation view of the other side of the false twist head.

Referring to FIGS. 1 and 2 of the drawings, there is shown a false twist head of which a U-shaped frame 11 is detachably secured to a base plate support with the limbs of the frame extending horizontally and spaced vertically one above the other.

The lower of the limbs of the frame is formed with a downwardly extending boss 12 the bottom face of which engagesthe upper face of the plate 10. The boss is formed on one side thereof with a shoulder 13 providing one abutment face which engages a step 14 providing another abutment face formed on the plate. The interengagement of the shoulder 13 with the step 14 defines the location of the frame 11 with respect to the support plate 10. The frame 11 is secured to the plate 10 by a bolt 15 which extends with clearance through a hole 16 in the upper limb of the frame and a hole 17 in the lower limb and the boss and is screw threaded at its lower end which is received in a screw threaded hole (not shown) in the plate 10. The bolt 15 has a face 18 towards the lower end thereof which abuts the upper face of the lower limb of the frame so that the limb is clamped to the plate. The upper end of the bolt 15 has an hexagonal head which projects from the hole 16 to enable the bolt to be readily tightened or released.

The lower limb of the frame 11 is divided into two side by side parts by a slot extending from the free end of the limb part way along the slot, the end of the slot remote from the free end of the limb being indicated by the reference numeral 19. Ex-

tending downwardly from the two parts of the lower limb are two elliptical section struts 20 the lower ends of which are connected by a bridging piece 21. The struts are arranged so that their major axes extend transversely to said lower limb.

A bearing housing 22 is formed on the bridging piece 21 between the struts in which a roller bearing 23 is located.

A vertically extending shaft 24 located between the struts 20 rests at its lower end on the inner annulus of the bearing and has a spigot 25 which is received in the inner annulus. The shaft is of greater diameter than the minor axes of the struts 2t) and the part of the shaft between the struts is encircled by a tightly fitting sleeve 26 of hard wearing synthetic material. A horizontally moving drive belt 9 makes frictional driving engagement with the sleeve 26. The shaft extends through the slot between the two parts of the lower limb of the frame, across the U-shaped frame and is mounted at its upper end in a further bearing 27 housed in a bore in the upper limb of the frame.

Secured on the part of the shaft 24 between the limbs of the frame is a driving wheel comprising a solid cylindrical member 28 of a light non-magnetic alloy to the periphery of which are secured two bands 29 of hard wearing rubber like synthetic material the bands being spaced apart to form a groove 30 between them.

A pair of powerful horseshoe permanent magnets 3ll (only one of which can be seen) are spaced apart by, and secured by adhesive to, a non-magnetic support block 32. The block has a vertical hole 33 extending through it through which the aforesaid bolt 15 passes with clearance. Projecting from the side of the block adjacent the base of the: U-shaped frame 11 is a cylindrical spigot 34 which extends through a hole 35 in the bend of the frame 11 and is received in a part cylindrical seat 36 formed in the upper surface of a block 37 formed on the outside of the bend of the frame 11.

A clamping member 38 having a part cylindrical seat 39 engages over the upper part of the spigot and is secured to the block 37 on either side of the spigot by screws 40. Loosening of the screws 40 permits the spigot to be rotated thereby rotat' ing the support block 32 and the horseshoe magnets. The screws 40 can then be tightened to clamp the spigot in the chosen position. The purpose of this adjustment will be ex plained later.

The magnets 31 are arranged with like poles adjacent one another. Pole pieces 41, 42 bridge the respective like pairs of pole pieces and are secured thereto by screws 43.

As can be clearly seen in FIG. ll of the drawings the pole pieces 41 and 42 are located with their respective projecting fingers 50 adjacent to the end faces of the cylindrical member 28 with the end faces of the fingers spaced radially inwardly of the peripheral surfaces of the bands 29.

The false twist spindle 53 which is made from steel extends parallel to the axis of the shaft 24 and is engaged by the bands 29 at two spaced locations. The spindle is formed with a periphery flange 54 which extends into the groove 30 between the bands. The spindle is drawn into engagement with the bands by the adjacent magnetically attracting fingers the ends of which are spaced radially from the spindle by the drive wheel to provide air gaps, the magnetic circuit between the fingers being completed through the spindle. The spindle 53 is hollow and has a pin extending across its bore at one end, the yarn to be false twisted being passed through the bore and once or twice around the pin in accordance with well known false twist practice.

As indicated earlier the horseshoe magnets are pivotally mounted in the frame 11 by means of the spigot 34 and the clamping means 37 and 38. By rotation of the magnets the positions of the fingers 50 with respect to the bands can be adjusted so that the spindle can be held in a position in which it extends parallel to the axis of the cylindrical member 28 or inclined to the axis ineither direction. Yarn tension tends to tilt the spindle in one direction and so the magnets are rotated to pretilt the spindle in the opposite direction so that in use yarn tension restores the spindle to a position in which it is parallel to the wheel axis.

The aforesaid base plate is formed with a hub 60 on the side of the step 13 remote from the frame 11 and projecting from the hub is a horizontally extending rod 61. The rod 61 is received in a hollow cylindrical sleeve 62 which has a polytetrafluoroethylene lining. The sleeve is formed at the upper end of a downwardly extending bracket 63. A rod 64 is secured to the lower end of the bracket 63 which rod extends parallel to the rod 61 and is received with clearance in a hearing 65 located in the lower end of a plate 66 secured to the un derside of the plate 10. The base plate 10 and with it the false twisting heads are thereby slidably mounted with respect to the bracket. The bracket 63 is secured by bolts 82 to one end of a member 67 of a frame for supporting a number of false twisting heads.

As shown in FIG. 3 of the drawings the sleeve 62 is formed on one side with an elongated closed slot 68 in which a pin 69 on the shaft 61 is slidable. Two pulley wheels 70, 71 are rotatably mounted about horizontal axes on the sleeve adjacent the opposite ends of the slot 68 respectively.

It will be appreciated that engagement of the pin 69 with either end of the slot 68 limits the travel of the sliding movement of the head. The length of the slot is such that the sleeve 26 of the shaft 24 of the head can be disengaged from either of the sides of the aforesaid drive belt 9 by sliding movement of the head.

Secured to the pin 69 is one end of a wire tether 72 the other end of which is secured to a weight 73. The wire tether can be led around either the wheel 70 or the wheel 71 and the weight acts to draw' the pin 69 towards the end of the slot adjacent to the wheel around which the wire is passed. The false twist head can thereby be urged in either direction of its sliding movement with respect to the fixed sleeve.

As shown in FIGS. 1 and 2 of the drawings a lever 74 is pivotally mounted at 75 on the opposite side of the sleeve 62 to the slot.

An upwardly extending cam plate 76 is secured by screws 77 to one side of the base plate 10. The plate 76 has sides which taper from a point adjacent the upper end of the plate to a point at the top of the plate. Fixed part way along one limb of the lever 74 is a projecting boss 78 which can be engaged with the lower part of one or other side of the cam plate 76 and thereby prevents sliding movement of the base plate 10 and the false twist head in one or other direction. The arrangement is such that when the boss 78 is engaged with one or other of the sides of the cam plate 76 the false twist head is at one or other ofthe limits of its sliding movement.

The other limb of the lever 74 is provided with a resilient detent 79 which is engageable by swinging of the lever in one of two spaced holes 80, 81 formed on the sleeve and located so that when the detent is engaged in the hole 80 the lever is positioned so that the boss 78 is engaged with one or other of the sides of the cam plate 76 and when the detent is engaged in the hole 81, the lever is positioned so that the boss 78 is held clear of the cam plate 76.

I claim:

1. Apparatus for false twisting yarn comprising a false twist head having a frame, a false twist machine having a support, mutually engaging abutments on said frame and said support for defining the location of said frame on said support, and means for releasably securing said frame to said support in the defined location.

2. The apparatus for false twisting yarn as defined in claim 1 wherein said false twist head, in addition to having a frame, comprises a drive shaft rotatably mounted in bearings on said frame, a driving wheel secured to said drive shaft, and means mounted on said frame for holding a false twist spindle in engagement with said driving wheel.

3. The apparatus for false twisting yarn as defined in claim 2 which further comprises a surface on said support for receiving said false twist head, a step on the surface of said support providing one of said mutually engaging abutments, a surface on said false twist head for engaging said surface of said support, and a shoulder on said surface of said twist head providing the other of said mutually en aging abutments.

4. The apparatus for false twis ing yam as defined in claim 2 wherein said mutually engaging abutments of said frame and said support are so positioned to define the location of the false twist head on said support in a direction extending transversely to the direction of the path of travel of the yarn through said false twist head.

5. The apparatus for false twisting yarn as defined in claim 2 wherein said mutually engaging abutments of said frame and said support are so positioned to define the location of said false twist head on said support in a direction extending transversely to the axis of rotation of said drive shaft.

6. The apparatus for false twisting yarn as defined in claim 5 wherein said drive shaft is driven by an endless belt, and said mutually engaging abutments of said frame and said support are so positioned to define the location of said false twist head on said support in a direction extending transversely to the path of travel of said endless belt. 

1. Apparatus for false twisting yarn comprising a false twist head having a frame, a false twist machine having a support, mutually engaging abutments on said frame and said support for defining the location of said frame on said support, and means for releasably securing said frame to said support in the defined location.
 2. The apparatus for false twisting yarn as defined in claim 1 wherein said false twist head, in addition to having a frame, comprises a drive shaft rotatably mounted in bearings on said frame, a driving wheel secured to said drive shaft, and means mounted on said frame for holding a false twist spindle in engagement with said driving wheel.
 3. The apparatus for false twisting yarn as defined in claim 2 which further comprises a surface on said support for receiving said false twist head, a step on the surface of said support providing one of said mutually engaging abutments, a surface on said false twist head for engaging said surface of said support, and a shoulder on said surface of said twist head providing the other of said mutually engaging abutments.
 4. The apparatus for false twisting yarn as defined in claim 2 wherein said mutually engaging abutments of said frame and said support are so positioned to define the location of the false twist head on said support in a direction extending transversely to the direction of the path of travel of the yarn through said false twist head.
 5. The apparatus for false twisting yarn as defined in claim 2 wherein said mutually engaging abutments of said frame and said support are so positioned to define the location of said false twist head on said support in a direction extending transversely to the axis of rotation of said drive shaft.
 6. The apparatus for false twisting yarn as defined in claim 5 wherein said drive shaft is driven by an endless belt, and said mutually engaging abutments of said frame and said support are so positioned to define the location of said false twist head on said support in a direction extending transversely to the path of travel of said endless belt. 